Boost Integrated Three-Phase Solar Inverter using Current Unfolding and Active Damping Methods

N. Ha Pham, Tomoyuki Mannen, K. Wada
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引用次数: 3

Abstract

This paper proposes a three-phase grid connected solar inverter with integrated boost function. The circuit operating principle is based on current unfolding and injection method, which is similar to that of a SWISS rectifier. This approach requires only two high frequency switches operating at only half voltage stress, thus leading to a significant reduction in switching losses. Other switches only operate at line frequency, and therefore can be optimized to reduce conduction losses. The proposed inverter therefore can deliver high efficiency. This paper discusses the basic operating principle as well as control method for the inverter. It is revealed that the output currents of the proposed inverter contains intrinsic oscillation due to current unfolding operation. In order to solve this problem, an active damping method is proposed to stabilize the operation. As a result, stable operation of the proposed method is confirmed by simulation. The feasibility of the proposed inverter is also confirmed using a mini laboratory prototype.
采用电流展开和主动阻尼方法的Boost集成三相太阳能逆变器
提出了一种集成升压功能的三相并网太阳能逆变器。电路的工作原理是基于电流展开和注入的方法,这与瑞士整流器的工作原理类似。这种方法只需要两个高频开关在只有一半电压应力下工作,从而导致开关损耗显著降低。其他开关仅在线频率下工作,因此可以优化以减少传导损耗。因此,所提出的逆变器可以提供高效率。本文论述了逆变器的基本工作原理和控制方法。结果表明,由于电流展开操作,逆变器的输出电流存在固有振荡。为了解决这一问题,提出了一种稳定运行的主动阻尼方法。仿真结果验证了该方法的稳定性。该逆变器的可行性也通过一个小型实验室样机得到了证实。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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